In a broadcast delivered from the White House by direct wire to the United Nations charter conference in San Francisco on April 25, 1945, President Harry Truman describes the challenges facing the new organization.

With the United States now entered into World War II, President Franklin D. Roosevelt uses the occasion of Washington’s birthday to broadcast to the nation on February 23, 1942, an outline of America’s progress in the war.

In his Labor Day radio broadcast in 1941, President Franklin D. Roosevelt reminds his fellow citizens of the need to devote America’s industrial effort to building weaponry in order to "crush Hitler and his Nazi forces."

In a broadcast from his home in Hyde Park, New York, on July 4, 1941, President Franklin D. Roosevelt warns Americans who wish not to get involved in the war that "the United States will never survive as a happy and fertile oasis of liberty surrounded by a cruel desert of dictatorship."

With the country at war at the start of his unprecedented fourth term as president of the United States, Franklin D. Roosevelt delivers a short and somber inaugural address at a simple ceremony without a parade or ball on January 20, 1945.

On March 12, 1947, President Harry Truman urges a joint session of Congress to support his doctrine, which calls for U.S. financial and military aid to Greece and Turkey in an effort to protect the countries from Soviet domination.

After a humanitarian mission in Somalia turned violent and U.S. soldiers were killed and dragged through the streets by a Somali gang, President Bill Clinton addresses the nation on October 7, 1993, regarding U.S. military action.

This John F. Kennedy vs. Richard Nixon 1960 presidential debate History Channel video shows Senator Kennedy speaking about the importance of the Social Security Act of 1935 and now was the time to do something for elderly medical care.

John F. Kennedy answers back to Nixon's accusation of supporting federal control of teacher salaries. Kennedy explains that was not the question before the Senate in February, the issue was whether to give federal aid to the state to support education.

Senator John F. Kennedy talks about the internal threat that communism poses to national security. Kennedy describes that these internal factions are serious and should be taken care of by supporting laws that the U.S. has already passed.